*{
    padding: 0;
    margin: 0;
    font-size: 14px;
    font-family: Arial, Helvetica, sans-serif;
    -webkit-user-select: none;
}

#box{
    position: relative;
    width: 450px;
    height: 450px;
    border: 1px solid green;
    >img{
        width: 100%;
        height: 100%;
    }
    >#mask{
        position: absolute;
        left: 0;
        top: 0;
        width: 304px;
        height: 304px;
        background: #fff111;
        box-shadow:0px 0px 3px #333333;
        opacity: 0.5;
        filter: opacity(50);
        cursor: move;
        display: none;
    }
}

#eyesWindow{
    width: 540px;
    height: 540px;
    position: absolute;
    left: 450px;
    top: 0;
    overflow: hidden;
    border: 1px solid green;
    display: none;
    img{
        width: 900px;
        height: 900px;
        position: absolute;
        left: 0;
        top: 0;
    }
}